Apply suggestion to res/values/strings.xml

    <string name="preferences_authors">Authors</string>

    <string name="preferences_source_code">Source code</string>

    <string name="preferences_licence">Licence</string>

    <string name="preferences_app_info_title">Contact information</string>

    <string name="preferences_app_info_title">Contacts information</string>

    <string name="preferences_app_info">-Contacts is an open source App for Android</string>

</resources>